Macroinvertebrate Survey The Ecological state of the Lake Durowskie - - PowerPoint PPT Presentation

Macroinvertebrate Survey The Ecological state of the Lake Durowskie during restoration measures

Karolina Przesmycka Michael Follath Michael Follath Sandra Moskalik Sina Danehl Timur Frunze

• Prof. Nicoara Mircea
• Msc. Ing Piotr Domek

• Introduction
• Material & Methods

Content

• Macroinvertebrates found
• Data & Data analysis
• Discussion & Conclusions

Lake Durowskie

Sample Stations

Stations Description

1 Littoral with reed near forest cover 2 Littoral near urban area 3 Pelagial near dam 4 Littoral near urban area

Lake Durowskie

4 Littoral near urban area 5 Pelagial (Areator I) 6 Pelagial near Struga Golaniecka River 7 Littoral near Camping ground 8 Littoral (Bulrush near forest cover) 9 Pelagial 10 Pelagial (Areator II) 11 Littoral with reed 12 Littoral near urban area 13 Littoral with reed near forest cover 14 Pelagial

Legal background

European Water Framework Directive (WFD)

• framework for the protection of water

bodies bodies

• target: 'good ecological quality status' for

all water bodies by 2015 need to identify and to assess pressures and impacts macroinvertebrates can be used as target

• rganisms

„Kajak” „czapla”

Material and Methods

Taking Samples and using sieving device

Material and Methods

Sorting, classification, weighting & determination

Material and Methods

• > 2 mm large enough to be seen with an unaided eye
• inhabiting all types of freshwater
• without a backbone

Macroinvertebrates

• generally abundant
• critical part of the lake’s food web
• cannot escape pollution & show effects of short- and long

term pollution events

Macroinvertebrates - Bioindicators

term pollution events

• generally good response to a multitude of stressors
• affected by the physical, chemical, and biological conditions
• can show the cumulative impacts of pollution
• diversity indicates local conditions
• relatively easy sampling technique

Macroinvertebrate Orders

Platyhelminthes (Flatworms) Nematoda (Roundworms) Oligochaeta (Aquatic worms) Hirudinea (Leeches) Gastropoda (Snails)

Glossiphonia complanata Anodonta anatina Trichoptera sp.

Gastropoda (Snails) Unionoida (Clams and Mussels) Isopoda (Pill Bugs) Megaloptera (Dobsonflies / Hellgrammites) Ephemeroptera (Mayflies) Trichoptera (Caddisflies) Diptera (True Flies) Acari (Mites and Ticks)

Sialis fuliginosa Chironomidae larvae Theodoxus fluviatilis Chaoborus flavicans

The Shannon-Wiener Index is a diversity index with a quantitative measure that reflects how many different species there are in a dataset, and simultaneously takes into account how evenly the individuals are distributed among the species found.

Data analysis

proportion of individuals 0,5 1 1,5 2 2,5 1 2 3 4 5 6 7 8 9 10 11 12 13 14

Shannon-Wiener index

2010 2011 2012 2013

Pielou’s species evenness refers to how close in numbers each species in an environment is. J’ is constrained between 0 and 1. The less variation in communities between the species, the higher J’ is.

Data analysis

0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14

Pielou's species evenness

2010 2011 2012 2013

The Simpson index is used to measure the degree of concentration when individuals are classified into type.

Data analysis

2,5

Simpson index

0,5 1 1,5 2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 2010 2011 2012 2013

EPT index is an index of water quality based on the abundance of three pollution-sensitive orders of macroinvertebrates. It is calculated as the sum of the number of Ephemeroptera, Plecoptera, and Trichoptera divided by the total number of Chironomidae. The EPT Index increases with improving water quality. EPT Index = Σ(EPT / total # organisms) * 100%

Data analysis

EPT

0,1 0,2 0,3 0,4 0,5 0,6 1 2 3 4 5 6 7 8 9 10 11 12 13 14

EPT

2010 2011 2012 2013

Conclusions

10 20 30 40 2010 2011 2012 2013

number of taxa

• Number of identified taxa with wide

ecological range continue to increase adapted to worse conditions

• According to the EPT-Index the species

adapted to good water quality are less adapted to good water quality are less abundant General trend of all used indices: The quality state of the lake is decreased

• In general the number of species which indicate a good water quality

decrease (e.g. no Plecoptera found) while at the same time the new found taxa indicate worse conditions higher biodiversity ≠ higher quality

• The species number in the littoral is higher than in the peligial
• Low effiency of the aerators

Thank you !!!